Could you explain the use of console.dir binding?

[sinewave440hz]

Hi Azat, got as far as Chapter 6 :) Just curious, would you mind clarifying the reasoning behind console.dir(event, this) binding in (for example) Listing 6-2? Eslint is saying that this binding is unnecessary in my project (I have a generic react project open for experimentation where I just added the same event handlers as shown in the listing). Thanks.